When Saul was seventeen, he witnessed the brutal gang-rape of his eleven-year-old sister Francine by boys he knew at school. The trauma triggered his latent schizophrenia, but for years, he managed to keep his mental illness under control with Haldol. As an adult, he became a successful author of children's books under the pen name William S. Falstaff.

Things changed in the fall of 2005, when Hurricane Katrina destroyed his home in New Orleans, Louisiana. He began having delusions of a terrible deluge, but the Haldol kept him from doing anything crazy. However, Francine died from unknown causes, and the Haldol eventually failed him. His doctor switched him to Rispiridone, but he disliked the severe stupefying effect that the new drugs caused him, and stopped taking them.

With his delusions of the deluge now getting worse, Saul began seeing his sister in other girls, and feared another rape was coming. He began kidnapping and raping young girls, under the crazed belief that they were his sister and they were fleeing from her rapists. He started with a girl in Gulfport, Mississippi, who he kidnapped and raped at the ruins of his home in New Orleans before leaving her to die. He then relocated to New York City, where he continued his crime spree.

Needless to say, this did not sit well with the ManhattanSpecial Victims Unit, who quickly identified, located, and apprehended him, though in the process, he managed to knock DetectiveElliot Stabler headfirst into a car, temporarily blinding him. Saul was caught shortly after. After an interview with Doctor George Huang, he was diagnosed as a schizophrenic.

After getting medication, Saul realized the severity of what he had done and began to suffer from severe remorse. Thinking he didn't deserve to live, he asked to be taken to Louisiana to be executed. Saul was put on trial for sexual assault, with Barry Moredock defending him and ADACasey Novak prosecuting, but was deemed incompetent to stand trial due to his violent outbursts in court. Back on his medication and feeling guilty for his actions, Saul tried and failed to commit suicide. Novak visited him to try to convince him to not give up and forgive himself as it wasn't entirely his fault.

He is currently committed to the New York State Mental Health Facility. (SVU: "Blinded")